The Yamaha PSR-195 is a 61-key portable keyboard that was released in the late 1990s. It is a popular choice among beginner and intermediate keyboard players. It has a range of features, including 100 preset voices, 100 preset rhythms, and a built-in sequencer. It also has a range of effects, including reverb, chorus, and vibrato. It is powered by six AA batteries or an optional AC adapter. It has been used by a variety of musicians, including John Legend, Alicia Keys, and Bruno Mars.